I'm trying to upgrade my SpamAssassin installation. I've gotten as far as updating to p5-Mail-SpamAssassin-3.2.5_2 (from 3.1.1) along with its dependencies. On installation, it told me to run sa-compile. When I try to run sa-compile, here's what I get:

I can't figure out what the problem might be. I've searched for various permutations of the dtor and virtual errors. I found one match for the error in basic_null_stream, but the post was in Japanese and didn't have any replies, anyway.